Tissot PRX Quartz vs Powermatic 80: Which to Buy? (2026)

How We Compared

We compared the two current 40mm PRX lines on movement, case dimensions, dial execution and long-term upkeep, using Tissot's published specifications. Both are the real PRX; they simply answer different questions. New to the model? Our automatic watches guide places the Powermatic in its wider field, and a winder keeps it running between wears.

The Quartz Case: Tissot PRX 40mm Quartz (T137.410)

Why we picked it: The quartz PRX is the design at its purest: every line of the 1978-derived case, a touch slimmer on the wrist than the automatic, with nothing to wind and quartz accuracy. If the look is what you're buying, this is the one.

The Automatic Case: Tissot PRX Powermatic 80 (Ice Blue)

Why we picked it: The Powermatic is the PRX collectors keep: a mechanical movement visible through the caseback, a textured waffle dial, and a reserve that runs more than three days off the wrist. It sits about half a millimeter taller than the quartz and asks for an occasional service, and it's the one you'll still be winding in twenty years.

Comparison Table

	PRX Quartz	PRX Powermatic 80	Link
Movement	Swiss quartz	Automatic, 80h reserve	See price→
Dial	Sunray finish	Waffle texture	See price→
Caseback	Solid	Exhibition glass
Case height (40mm)	10.40mm	10.93mm
Water resistance	100m	100m
Maintenance	Battery changes	Periodic movement service

How to Decide

Buy quartz for the design, automatic for the object. If the PRX pull is how it looks on the wrist, quartz delivers all of that with the least upkeep. If the pull is owning a mechanical Swiss watch, only the Powermatic scratches it. Neither buyer regrets their logic, only borrowing the other's.

The 80-hour reserve is the automatic's headline spec. Many automatics stop after a day and a half off the wrist; the Powermatic 80 runs from Friday removal to Monday morning with hours to spare. It turns the classic automatic annoyance into a non-issue.

Thickness is closer than the forums say. On Tissot's own listings the 40mm quartz is 10.40mm tall and the 40mm Powermatic 80 is 10.93mm. Half a millimeter is a real but small difference under a shirt cuff; the case shape and integrated bracelet matter more.

Upkeep differs long-term. Quartz asks for a battery now and then, and Tissot fits an end-of-life indicator to warn you. The automatic wants a periodic movement service from a watchmaker. Plan for whichever kind of upkeep you are happier to live with.

Powermatic 80 accuracy and power reserve

	PRX 40mm Quartz	PRX Powermatic 80 (35mm / 40mm)
Movement	Swiss quartz, date, end-of-life battery indicator	Powermatic 80 Swiss automatic
Power reserve	Battery	80 hours
Balance spring	n/a	Nivachron (titanium alloy)
Tissot accuracy spec	Quartz	±5 s/day, regulated at +3 s (−2 to +8 s/day)
Case sizes	40mm	35mm and 40mm
Case height	10.40mm (40mm)	10.93mm (35mm and 40mm)
Water resistance	100m (10 bar)	100m (10 bar)
Crystal / caseback	Sapphire	Sapphire / see-through caseback

Powermatic 80 accuracy is the most specific question this page gets, and Tissot answers it directly. The company publishes three grades of the movement: a standard version at ±7 seconds a day, an "elaborated" version at ±5 seconds a day regulated at +3 seconds (a daily variation of −2 to +8 seconds), and a COSC-certified chronometer version. Tissot lists the PRX among the elaborated watches, so −2 to +8 seconds a day is the factory target. Real-world results vary with how you wear and rest the watch.

The 80 hours come from two changes Tissot describes to the ETA 2824 base: the beat rate drops from 4Hz to 3Hz to use less energy, and a thinner barrel arbor makes room for a longer mainspring. The Nivachron balance spring is a titanium alloy that Tissot says significantly improves resistance to magnetic fields, which matters around laptops, phone cases and bag clasps. Specifications above are from Tissot's product and movement pages; check the exact reference before you buy.

PRX vs PRX Powermatic 80: which to buy

Choose the PRX quartz if you change watches often, want a grab-and-go piece that is always on time, or simply want the 1978-derived case and integrated bracelet without thinking about winding. You give up the waffle dial and the see-through back, and gain a slightly slimmer case and the inherent accuracy of quartz. Choose the PRX Powermatic 80 if you want to watch the rotor turn, like the textured waffle dial, or plan to wear one watch most days. The 80-hour reserve means a weekend in the drawer won't stop it. The 35mm Powermatic suits smaller wrists and keeps the same 10.93mm height, so it wears noticeably more compact than the 40mm.

Comparing the PRX Powermatic with Tissot's dressier automatics? The Le Locle Powermatic 80 uses the same movement family in a 39.3mm round case at 9.75mm tall with 30m water resistance, per Tissot's listing. It is the more formal choice; the PRX is the sportier everyday one with more than three times the water resistance. For dress-first options, see our automatic watches guide.

Bottom Line: Which Should You Buy?

For the design at its purest: the PRX Quartz — the icon's look, slimmest and simplest to own.

For the mechanical keeper: the PRX Powermatic 80 — waffle dial, glass back, 80 hours of heartbeat.

Frequently Asked Questions

Should I get the PRX quartz or the Powermatic 80?

If you care about mechanical watchmaking, the Powermatic 80: the movement, waffle dial and see-through back are genuine differences, not padding. If you're buying the design, the quartz gives you all of it with less upkeep. Both are real PRXs.

How accurate is the Powermatic 80?

Tissot rates the PRX's Powermatic 80 at ±5 seconds a day, regulated at +3 seconds, for a daily variation of −2 to +8 seconds. It also runs about 80 hours off the wrist. Any quartz will be more accurate day to day; that is simply what quartz does better.

What sizes does the PRX come in?

Tissot lists the PRX in 35mm and 40mm cases. The 40mm is the classic proportion for most wrists; the 35mm suits slimmer wrists.

Does the PRX quartz have the waffle dial?

No. The waffle texture belongs to the Powermatic 80 models; quartz models do without it. It's the fastest way to tell the two apart across a room.

Is the Tissot PRX a good investment?

Buy it to wear, not as an asset. What you get is a 316L steel case and integrated bracelet, a sapphire crystal, 100m water resistance and, on the Powermatic 80, a Swiss automatic with an 80-hour reserve and a magnetism-resistant Nivachron spring. Those are the construction details that make it last.

Is the Powermatic 80 a good movement?

It is a well-documented modern Swiss automatic. Tissot introduced it in 2013 as an evolution of the ETA 2824, slowing the beat to 3Hz and lengthening the mainspring to reach 80 hours, and later added the Nivachron balance spring.

How We Research

Picks are based on manufacturer specifications and current Amazon availability, captured at the time of research. Listing details and stock change — confirm current details at the retailer before buying.

Care note: Integrated bracelets can't swap for straps, so treat the bracelet as part of the case: rinse after sweat or salt, and a soft toothbrush between links quarterly keeps the brushed finish crisp.